gleanen
Gleanen is a fictional mineral used in speculative geology to illustrate concepts of metasomatic formation and mineral substitution. In the imagined framework, gleanen forms under high-temperature hydrothermal conditions and presents as green to olive-green crystals that may exhibit a vitreous to pearly luster.
Composition and structure in the conventional fictional scheme describe gleanen as a layered silicate related to
Occurrence and formation are attributed to hydrothermal veins within a orogenic crust, where fluids rich in
Properties and potential uses in the fictional context include a Mohs hardness around 4–5 and a refractive
Etymology and status: The name combines elements suggesting light and appearance, but gleanen is not an officially